For the past few months, we have been working at CIRCL (Computer Incident Response Center Luxembourg) to develop an aggregated view of vulnerabilities. This is particularly in response to the recent fragmentation of sources due to regulations, vendors providing their own feeds, and the addition of sources such as the CISA known vulnerability list.
The project, known as 'vulnerability-lookup,' is also an open-source initiative. We offer an online version for user convenience. It already includes more than 15 sources, such as the NIST NVD CVE, CVEProject's cvelist, Cloud Security Alliance, GitHub Advisory Database, PySec Advisory Database, OpenSSF Malicious Packages, and the CSAF (OASIS) sources like Siemens, CERT-Bund, or Cisco.